<template>
  <div class="login_container">
    <div class="login_box">
      <!--头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" />
      </div>
      <!--登录表单区 -->
      <el-form class="login_form" ref="loginForm" :model="loginForm" :rules="loginRules" >
        <!--用户名 -->
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            placeholder="请输入用户名"
            prefix-icon="iconfont icon-user"
          ></el-input>
        </el-form-item>
        <!--密码-->
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            placeholder="请输入密码"
            show-password
            prefix-icon="iconfont icon-3702mima"
          ></el-input>
        </el-form-item>
        <!--按钮-->
        <el-form-item class="btn">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="loginFormReset">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 这是登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 这是表单的验证规则
      loginRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在3到10个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在6到15个字符', trigger: 'blur' }
        ]
      }
    }
  },
  methods: {
    loginFormReset () {
      this.$refs.loginForm.resetFields()
    },
    login () {
      this.$refs.loginForm.validate(async valid => {
        if (!valid) return
        const result = await this.$http.post('login', this.loginForm)
        if (result.data.meta.status !== 200) return this.$message.error('登录失败')
        this.$message.success('登录成功')
        // 将登录成功之后的token，保存到客户端的 sessionStorage 中
        window.sessionStorage.setItem('token', result.data.data.token)
        // 通过编程式导航跳转到后台主页，路由地址是 /home
        this.$router.push('/home')
      })
    }
    }
  }
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  background-color: #fff;
  width: 450px;
  height: 300px;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  width: 130px;
  height: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #ddd;
  background-color: #eee;
  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  box-sizing: border-box;
  padding: 20px;
  .btn {
    display: flex;
    justify-content: flex-end;
  }
}
</style>
